Recently, the most big issue in CCTV market must be the
expansion of Full - HD (High Definition) system. The change of resolution from
the existing SD (Standard - Definition) class (720x480 in case of NTSC) to FullHD (1920x1080, 1080p) requires the whole system change, not only the video
quality enhancement of camera simply. Because the conventional SD - CCTV
(NTSC/PAL) is based on analog TV standard, it could not meet the market request
for the high - resolution, clearer video image in digital era of HD TV.
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